6 KI (aq) + 2 KMnO4 (aq) + 4 H2SO4 (aq) → 3 I2 (s) + 2 MnO2 (s) + 4 K2SO4 (aq) + 4 H2O (l)
This is an oxidation-reduction (redox) reaction:
2 MnVII + 6 e- → 2 MnIV (reduction)
6 I-I - 6 e- → 6 I0 (oxidation)
KMnO4 is an oxidizing agent, KI is a reducing agent.
This is a precipitation reaction: I2 andMnO2 is the formed precipitate.